Hi,
Using devstack to deploy OpenStack, I have Controller + Network running at one
physical node and Compute at a separate node.
I launched a VM at the Compute node with a private address 10.0.0.2 (Neutron
router interface is 10.0.0.1).
At the Controller node, in the qrouter namespace, I could not ping the VM
private address 10.0.0.2.
At the Compute node, tcpdump of the tap interface indicated ARP requests were
received.
However, it did not show any ARP response.
My understanding is that the VM’s virtual interface is directly connected to
this tap interface. Since the VM is unreachable, I cannot
launch its console to see if the ARP requests are received at the virtual
interface.
Any suggestions on how to troubleshoot this?
localadmin@qa4:~/devstack$ nova show vm1
+--------------------------------------+----------------------------------------------------------------+
| Property | Value
|
+--------------------------------------+----------------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL
|
| OS-EXT-AZ:availability_zone | nova
|
| OS-EXT-STS:power_state | 1
|
| OS-EXT-STS:task_state | -
|
| OS-EXT-STS:vm_state | active
|
| OS-SRV-USG:launched_at | 2014-10-12T14:25:15.000000
|
| OS-SRV-USG:terminated_at | -
|
| accessIPv4 |
|
| accessIPv6 |
|
| config_drive |
|
| created | 2014-10-12T14:23:30Z
|
| flavor | m1.tiny (1)
|
| hostId |
00ac69883737ebd290ad4f38cae979a6e268902333261ba6bfbade44 |
| id | 04b5a345-cadf-4dee-9209-5bcf589b6a3c
|
| image | cirros-0.3.2-x86_64-uec
(14a55982-a093-4850-80c8-7b2ae3a7eaba) |
| key_name | -
|
| metadata | {}
|
| name | vm1
|
| os-extended-volumes:volumes_attached | []
|
| private network | 10.0.0.2, 172.29.173.5
|
| progress | 0
|
| security_groups | default
|
| status | ACTIVE
|
| tenant_id | 90058797dddc49efae4d1f45aa5ab982
|
| updated | 2014-10-12T14:23:39Z
|
| user_id | 5ab6344540974a1fbda5b539778ebe35
|
+--------------------------------------+----------------------------------------------------------------+
localadmin@qa4:~/devstack$
localadmin@qa4:~/devstack$ ip netns
qdhcp-f55f0683-830f-4523-82cb-46d638f91d47
qrouter-62aecbdd-d58d-4b33-a743-b16ca38544c5
localadmin@qa4:~/devstack$
localadmin@qa4:~/devstack$
localadmin@qa4:~/devstack$ sudo ip netns exec
qrouter-62aecbdd-d58d-4b33-a743-b16ca38544c5 ping 10.0.0.2
PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
>From 10.0.0.1 icmp_seq=1 Destination Host Unreachable
>From 10.0.0.1 icmp_seq=2 Destination Host Unreachable
>From 10.0.0.1 icmp_seq=3 Destination Host Unreachable
>From 10.0.0.1 icmp_seq=4 Destination Host Unreachable
>From 10.0.0.1 icmp_seq=5 Destination Host Unreachable
>From 10.0.0.1 icmp_seq=6 Destination Host Unreachable
localadmin@qa5:~/devstack$ sudo tcpdump -i tapade47169-57
tcpdump: WARNING: tapade47169-57: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tapade47169-57, link-type EN10MB (Ethernet), capture size 65535
bytes
11:58:30.042379 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 42
11:58:31.041840 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 42
11:58:32.041848 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 42
11:58:33.044212 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 42
11:58:34.041866 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 42
Thanks,
Danny
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